SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Link-ID == false, connect failed
mysql error: Too many connections
mysql error number: 1040
mysql version: unknown
php version: 5.6.30
Date: 14.12.2017 @ 22:06
Script: /board.php?boardid=149&sid=e1e25fac335d267afa0252ce08ed763d
Referer: